"With today’s news, DAZ Studio will be the first application to make NVIDIA Iray 2015 available to the public.
DAZ Studio users will be able to use the newest version of the advanced rendering technology that is available in premium products such as Maya and 3D Studio Max."
So, yeah, DAZ Studio`s new default render engine is NVIDIA Iray 2015. Unbiased, no plugins, no export to external engines, fully integrated and free. And the quality of course, is incredible.
If your computer runs 64 bit DS it will run Iray. A minimum of 4GB of Video ram on an NVIDIA card recommended (or more than one card) to take best advantage of its capabilities, but you get the same renders with or without graphics cards.
As a LuxRender user since the first version of Reality years ago and then with Luxus, I am seriously happy with this new addition!